ecmascript2019
There are 3 repositories under ecmascript2019 topic.
yanhaijing/es5
ecmascript 5 中文版 + es合集
Zhang-RenWen/modern-web-dev-notes
The majority of the content (useful syntax) is extracted from (Chinese) Practical Modern JavaScript: Dive into ES6 and the future of JavaScript- Nicolas Bevacqua. 2018-05. More new Javascript features are from other resource.